/PROP/SHELL ***NEW FEATURE USER DOCUMENT EXAMPLE***

/PROP/TYPE1/prop_ID/unit_ID or /PROP/SHELL/prop_ID/unit_ID

prop_title

I_shell

I_smstr

I_sh3n

I_dril

I_pinch

P_thick_fail

h_m

h_f

h_r

d_m

d_n

N

Thick

A_shear

I_thick

I_plas

prop_ID

Property identifier.

(Integer, maximum 10 digits)

unit_ID

Unit Identifier.

(Integer, maximum 10 digits)

prop_title

Property title.

(Character, maximum 100 characters)

I_shell

4 node shell element formulation flag.= 0Use value in /DEF_SHELL.= 1 Default, if /DEF_SHELL is not definedQ4, visco-elastic hourglass modes orthogonal to deformation and rigid modes (Belytschko).= 2Q4, visco-elastic hourglass without orthogonality (Hallquist).= 3Q4, elasto-plastic hourglass with orthogonality.= 4Q4 with improved type 1 formulation (orthogonalization for warped elements).= 12QBAT shell formulation.= 24QEPH shell formulation.

(Integer)

I_smstr

Shell small strain formulation flag. 4= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1Small strain from time = 0 (formulation compatible with all other formulation flags).= 2 Default, if /DEF_SHELL is not definedFull geometric nonlinearities with possible small strain formulation activation in Radioss Engine (option /DT/SHELL/CST).= 3Old small strain formulation (only compatible with I_shell = 2).= 4Full geometric nonlinearities (in Radioss Engine, option /DT/SHELL/CST has no effect).= 10Lagrange type total strain for hyperelastic material laws.

(Integer)

I_sh3n

3 node shell element formulation flag.= 0Use value in /DEF_SHELL.= 1Standard triangle (C0).= 2 Default, if /DEF_SHELL is not definedStandard triangle (C0) with modification for large rotation.= 30DKT18.= 31DKT_S3, which based on DTK12 of BATOZ (refer to the Element Library in the Theory Manual).

(Integer)

I_dril

Drilling degree of freedom stiffness flag. 3= 0Use value in /DEF_SHELL.= 1Yes.= 2 Default, if /DEF_SHELL is not definedNo.

(Integer)

I_pinch

Pinching degree of freedom flag. 12= 0Disable= 1Enable

(Integer)

P_thick_fail

Ratio of through thickness integration points that must fail before the element is deleted. 11

0.0≤P_thickfail≤1.00.0≤P_thickfail≤1.0

(Real)

h_m

Shell membrane hourglass coefficient. 5

Only used when I_shell=1, 2, 3, 4.

Default = 0.01 for I_shell =1, 2, 4.

Default = 0.1 for I_shell = 3.

(Real)

h_f

Shell out-of-plane hourglass. 5

Only used when I_shell=1, 2, 3, 4.

Default = 0.01 (Real)

h_r

Shell rotation hourglass coefficient. 5

Only used when I_shell=1, 2, 3, 4.

Default = 0.01 for I_shell =1, 2, 4.

Default = 0.1 for I_shell = 3.

(Real)

d_m

Shell Membrane Damping

For default values, refer to the table in Comment 7.

(Real)

d_n

Shell numerical damping. 6

It is only used for I_shell =12, 24 and I_sh3n = 30

Default =0.015 for I_shell =24 (QEPH)

Default =0.001 for I_shell =12 (QBAT)

Default =0.0001 for I_sh3n =30 (DKT18)

(Real)

N

Number of integration points through the thickness with 0 < N < 10. 10= 0 (Default)Means global integration model for material LAW1, and automatically set N=3 for other material laws.= 1Membrane behavior.

(Integer)

Thick

Shell thickness.

(Real)

[m][m]

A_shear

Shear factor.

Default is Reissner value: 5/6 (Real)

I_thick

Shell resultant stresses calculation flag. 8= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1Thickness change is taken into account.= 2 Default, if /DEF_SHELL is not definedThickness is constant.

(Integer)

I_plas

Shell plane stress plasticity flag. 9

It is available for material laws 2, 22, 27 and 36.= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1 Default for LAW36 and global integration.Iterative projection with three Newton iterations.= 2 Default, if /DEF_SHELL is not defined or for LAW2 and global integrationRadial return.

(Integer)